<template>
    <view class="container">
        <scroll-view class="groupon-list" :scroll-y="true" :scroll-top="scrollTop">
            <view class="item" v-for="(item, index) in grouponList" :key="index">
                <navigator :url="'/pages/goods/goods?id=' + item.id">
                    <image class="img" :src="item.picUrl" background-size="cover"></image>
                    <view class="right">
                        <view class="text">
                            <view class="header">
                                <text class="name">{{ item.name }}</text>
                                <van-tag type="primary">{{ item.grouponMember }}人成团</van-tag>
                            </view>
                            <view class="expire">
                                <van-tag round type="warning">有效期至 {{ item.expireTime }}</van-tag>
                            </view>
                            <text class="desc">{{ item.brief }}</text>
                            <view class="price">
                                <view class="counterPrice">现价：￥{{ item.retailPrice }}</view>
                                <view class="retailPrice">团购价：￥{{ item.grouponPrice }}</view>
                            </view>
                        </view>
                    </view>
                </navigator>
            </view>

            <view class="page" v-if="showPage">
                <view :class="'prev ' + (page <= 1 ? 'disabled' : '')" @tap="prevPage">上一页</view>
                <view :class="'next ' + (count / limit < page ? 'disabled' : '')" @tap="nextPage">下一页</view>
            </view>
        </scroll-view>
    </view>
</template>

<script>
// pages/groupon/grouponList/grouponList.js
var util = require('../../../utils/util.js');
var api = require('../../../config/api.js');
var app = getApp();
export default {
    data() {
        return {
            grouponList: [],
            page: 1,
            limit: 10,
            count: 0,
            scrollTop: 0,
            showPage: false
        };
    }
    /**
     * 生命周期函数--监听页面加载
     */,
    onLoad: function (options) {
        this.getGrouponList();
    },
    /**
     * 生命周期函数--监听页面初次渲染完成
     */
    onReady: function () {},
    /**
     * 生命周期函数--监听页面显示
     */
    onShow: function () {},
    /**
     * 生命周期函数--监听页面隐藏
     */
    onHide: function () {},
    /**
     * 生命周期函数--监听页面卸载
     */
    onUnload: function () {},
    /**
     * 页面相关事件处理函数--监听用户下拉动作
     */
    onPullDownRefresh: function () {},
    /**
     * 页面上拉触底事件的处理函数
     */
    onReachBottom: function () {},
    /**
     * 用户点击右上角分享
     */
    onShareAppMessage: function () {},
    methods: {
        getGrouponList: function () {
            let that = this;
            that.setData({
                scrollTop: 0,
                showPage: false,
                grouponList: []
            });
            // 页面渲染完成
            uni.showToast({
                title: '加载中...',
                icon: 'loading',
                duration: 2000
            });
            util.request(api.GroupOnList, {
                page: that.page,
                limit: that.limit
            }).then(function (res) {
                if (res.errno === 0) {
                    that.setData({
                        scrollTop: 0,
                        grouponList: res.data.list,
                        showPage: true,
                        count: res.data.total
                    });
                }
                uni.hideToast();
            });
        },

        nextPage: function (event) {
            var that = this;
            if (this.page > that.count / that.limit) {
                return true;
            }
            that.setData({
                page: that.page + 1
            });
            this.getGrouponList();
        },

        prevPage: function (event) {
            if (this.page <= 1) {
                return false;
            }
            var that = this;
            that.setData({
                page: that.page - 1
            });
            this.getGrouponList();
        }
    }
};
</script>
<style>
page,
.container {
    width: 750rpx;
    height: 100%;
    overflow: hidden;
    background: #f4f4f4;
}

.groupon-list {
    width: 750rpx;
    height: 100%;
    overflow: hidden;
    background: #f4f4f4;
}

.groupon-list .item {
    height: 244rpx;
    width: 100%;
    background: #fff;
    margin-bottom: 20rpx;
}

.groupon-list .img {
    margin-top: 12rpx;
    margin-right: 12rpx;
    float: left;
    width: 220rpx;
    height: 220rpx;
}

.groupon-list .right {
    float: left;
    height: 244rpx;
    width: 476rpx;
    display: flex;
    flex-flow: row nowrap;
}

.groupon-list .text {
    display: flex;
    flex-wrap: nowrap;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    height: 244rpx;
    width: 476rpx;
}

.groupon-list .name {
    float: left;
    display: block;
    color: #333;
    line-height: 50rpx;
    font-size: 30rpx;
}

.groupon-list .desc {
    width: 476rpx;
    display: block;
    color: #999;
    line-height: 50rpx;
    font-size: 25rpx;
}

.groupon-list .price {
    width: 476rpx;
    display: flex;
    color: #ab956d;
    line-height: 50rpx;
    font-size: 33rpx;
}

.groupon-list .counterPrice {
    text-decoration: line-through;
    font-size: 28rpx;
    color: #999;
}

.groupon-list .retailPrice {
    margin-left: 30rpx;
    font-size: 28rpx;
    color: #a78845;
}

.page {
    width: 750rpx;
    height: 108rpx;
    background: #fff;
    margin-bottom: 20rpx;
}

.page view {
    height: 108rpx;
    width: 50%;
    float: left;
    font-size: 29rpx;
    color: #333;
    text-align: center;
    line-height: 108rpx;
}

.page .prev {
    border-right: 1px solid #d9d9d9;
}

.page .disabled {
    color: #ccc;
}
</style>
